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======琴生不等式与对称式======
鉴于前几天有人问了不等式的问题，本页面提一下不等式。
=====Jensen不等式=====
琴生不等式你们学高数的时候都学过了，不讲了哈哈哈。
=====Kalamata不等式=====
叙述卡拉玛特不等式需要借助序列的“优超”概念。
若n项序列a与b均为正序列，并且部分和序列满足a的部分和始终大于等于b的部分和，只有第n项部分和（全体的和）两者相等。称a优于b。
=====Muirhead不等式=====
米尔黑德不等式是卡拉玛特不等式的特例。
=====Schur不等式=====
舒尔不等式是米尔黑德不等式的特例。